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I 29 January 1996 AGE-NC Project No 95-0143 IPage 4 of 6 3 5 COLLECTION OF GROUND WATER SAMPLES For both sampling events, water samples were collected from each purged well wing new disposable bailers and transferred into 40-mI EPA vials contairung hydrochloric acid as a preservative The samples were transported in a chilled container to MAI and analyzed for TPH-g and BTE&X in accordance with EPA methods 5030 and 602, respectively E E36 SURVEYING On 29 November 1995, the casing elevations of all monitoring wells at the site were surveyed to the nearest 0 01 foot using a Nikon builders level (Table 1) All elevations were surveyed relative to Emonitoring well MW-1 located at the former Chase Chevrolet service center 1 block east of the site to allow correlation between the two sites Well I1iNNI-1 was previously surveyed and assigned an Earbitrary elevation of 12 85 feet, as estimated from a USGS Topographic sheet 4.0. FINDINGS 41 STRATIGRAPHY EFill material was present over most of the site to depths of 3 to 5 feet bsg Silt and clayey silt were encountered to depths of 19 feet bsg in wells MW-10 and MW-17 and to depths of 25 feet bsg in Ewells MW-14, MW-15 and MW-16 Silty sand was encountered from depths of 19 to 37 feet bsg in MW-10, from depths of 25 to 36 feet bsg in MW-14, and from depths of 25 to 34 feet bsg in wells MW-15 and MW-16 Silty clay, clay and clayey silt were present in MW-17 from depths of 19 to 36 Efeet bsg and m wells MW-15 and MW-16 from depths of 34 to 36 feet bsg Boring logs are included as Appendix A E 42 ANALYTICAL RESULTS OF SOIL SAMPLES ENo organic vapors or hydrocarbon odors were detected in soil samples or auger returns monitored dunng this investigation One soil sample from a depth of 25 feet bsg in each boring was analyzed for E TPH-g and BTE&X No petroleum hydrocarbons were detected in any of the samples analyzed Analytical results are summarized on Table 2 The laboratory reports (MAI Laboratory I D Nos 56918 and 58881 - 58884) and chain-of-custody forms are included in Appendix C E E E